Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides
Publication
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Qian, D; Xu, B; Chi, M; Meng, YS
Published in: Physical Chemistry Chemical Physics
July 28, 2014
A novel oxygen vacancy assisted transition metal (TM) diffusion mechanism is proposed for the first time to explain the near-surface phase transformation in lithium excess transition metal layered oxides. Oxygen vacancies and TM migration have been observed at nm scale spatial resolution by Scanning Transmission Electron Microscopy and Electron Energy Loss Spectroscopy. Formation of (dilute) oxygen vacancies and their roles in assisting transition metal ion diffusion were further investigated using first principles calculations. The activation barriers of TM diffusion in the presence of oxygen vacancies are drastically reduced and consistently in a reasonable range for room temperature diffusion. © the Partner Organisations 2014.
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Published In
Physical Chemistry Chemical Physics
DOI
ISSN
1463-9076
Publication Date
July 28, 2014
Volume
16
Issue
28
Start / End Page
14665 / 14668
Related Subject Headings
- Chemical Physics
- 51 Physical sciences
- 40 Engineering
- 34 Chemical sciences
- 09 Engineering
- 03 Chemical Sciences
- 02 Physical Sciences
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Qian, D., Xu, B., Chi, M., & Meng, Y. S. (2014). Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides. In Physical Chemistry Chemical Physics (Vol. 16, pp. 14665–14668). https://doi.org/10.1039/c4cp01799d
Qian, D., B. Xu, M. Chi, and Y. S. Meng. “Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides.” In Physical Chemistry Chemical Physics, 16:14665–68, 2014. https://doi.org/10.1039/c4cp01799d.
Qian D, Xu B, Chi M, Meng YS. Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides. In: Physical Chemistry Chemical Physics. 2014. p. 14665–8.
Qian, D., et al. “Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides.” Physical Chemistry Chemical Physics, vol. 16, no. 28, 2014, pp. 14665–68. Scopus, doi:10.1039/c4cp01799d.
Qian D, Xu B, Chi M, Meng YS. Uncovering the roles of oxygen vacancies in cation migration in lithium excess layered oxides. Physical Chemistry Chemical Physics. 2014. p. 14665–14668.
Published In
Physical Chemistry Chemical Physics
DOI
ISSN
1463-9076
Publication Date
July 28, 2014
Volume
16
Issue
28
Start / End Page
14665 / 14668
Related Subject Headings
- Chemical Physics
- 51 Physical sciences
- 40 Engineering
- 34 Chemical sciences
- 09 Engineering
- 03 Chemical Sciences
- 02 Physical Sciences